A block is pulled by a rope at a constant speed 60 cm up an incline that makes a 30∞ angle with the floor. The tension in the rope is 4 N and is parallel to the incline. If the block has a mass of 3 kg, how much work is done by the pulling force on the block?

Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?